Rename Agent to AIAgent and instroduce DisplayName (#201)

dotnet/src/Microsoft.Extensions.AI.Agents/AgentExtensions.cs

@@ -3,7 +3,7 @@
 namespace Microsoft.Extensions.AI.Agents;
 
 /// <summary>
-/// Extension methods for <see cref="Agent"/>.
+/// Extension methods for <see cref="AIAgent"/>.
 /// </summary>
 public static class AgentExtensions
 {
@@ -13,7 +13,7 @@ public static class AgentExtensions
     /// <param name="agent">The agent to wrap.</param>
     /// <param name="sourceName">An optional source name that will be used on the telemetry data.</param>
     /// <returns>An <see cref="OpenTelemetryAgent"/> that wraps the original agent with telemetry.</returns>
-    public static OpenTelemetryAgent WithOpenTelemetry(this Agent agent, string? sourceName = null)
+    public static OpenTelemetryAgent WithOpenTelemetry(this AIAgent agent, string? sourceName = null)
     {
         return new OpenTelemetryAgent(agent, sourceName);
     }

dotnet/src/Microsoft.Extensions.AI.Agents/ChatCompletion/ChatClientAgent.cs

@@ -15,7 +15,7 @@ namespace Microsoft.Extensions.AI.Agents;
 /// <summary>
 /// Represents an agent that can be invoked using a chat client.
 /// </summary>
-public sealed class ChatClientAgent : Agent
+public sealed class ChatClientAgent : AIAgent
 {
     private readonly ChatClientAgentOptions? _agentOptions;
     private readonly ILogger _logger;

dotnet/src/Microsoft.Extensions.AI.Agents/OpenTelemetryAgent.cs

@@ -18,9 +18,9 @@ namespace Microsoft.Extensions.AI.Agents;
 /// This class provides telemetry instrumentation for agent operations including activities, metrics, and logging.
 /// The telemetry output follows OpenTelemetry semantic conventions in <see href="https://opentelemetry.io/docs/specs/semconv/gen-ai/gen-ai-agent-spans/"/> and is subject to change as the conventions evolve.
 /// </remarks>
-public sealed class OpenTelemetryAgent : Agent, IDisposable
+public sealed class OpenTelemetryAgent : AIAgent, IDisposable
 {
-    private readonly Agent _innerAgent;
+    private readonly AIAgent _innerAgent;
     private readonly ActivitySource _activitySource;
     private readonly Meter _meter;
     private readonly Histogram<double> _operationDurationHistogram;
@@ -32,7 +32,7 @@ public sealed class OpenTelemetryAgent : Agent, IDisposable
     /// </summary>
     /// <param name="innerAgent">The underlying agent to wrap with telemetry.</param>
     /// <param name="sourceName">An optional source name that will be used on the telemetry data.</param>
-    public OpenTelemetryAgent(Agent innerAgent, string? sourceName = null)
+    public OpenTelemetryAgent(AIAgent innerAgent, string? sourceName = null)
     {
         this._innerAgent = Throw.IfNull(innerAgent);